diff --git a/docs/source/tts/models_introduction.md b/docs/source/tts/models_introduction.md
index edf6f312c..202fe491a 100644
--- a/docs/source/tts/models_introduction.md
+++ b/docs/source/tts/models_introduction.md
@@ -251,8 +251,10 @@ Vocoders based on neural networks usually is speech synthesis, which learns the
 - GAN
     - WaveGAN
     - **Parallel WaveGAN**
-    - MelGAN
-    - HiFi-GAN
+    - **MelGAN**
+    - **Style MelGAN**
+    - **Multi Band MelGAN**
+    - **HiFi GAN**
 - VAE
     - Wave-VAE
 - Diffusion